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It doesnt, you have to send it manually.
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Thanks Vasil,<br />
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Each time I add someone to the group, must I resend the invitations to the whole group, resulting in everyone getting another invitation?I
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Thanks Vasil,

Each time I add someone to the group, must I resend the invitations to the whole group, resulting in everyone getting another invitation?I

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Only if you want an actual invitation to be sent. Permissions should still apply, even without the invitation.
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Only if you want an actual invitation to be sent. Permissions should still apply, even without the invitation.

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If an invitation is not sent, will the user realize the calendar is available for view or must he open the calendar by name? We tried just adding someone to the group and there was not indication to the user that the calendar was available. Maybe I am missing something ....
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If an invitation is not sent, will the user realize the calendar is available for view or must he open the calendar by name? We tried just adding someone to the group and there was not indication to the user that the calendar was available. Maybe I am missing something ....

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Thanks Vasil. Saved me much time .
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I am sharing an Office 365 Calendar using a Security Group. When the calendar was initially shared, it sent invitation emails to the group members. How do I manage invitations when I add someone to the group? It doesn't appear to do it automatically.
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I am sharing an Office 365 Calendar using a Security Group. When the calendar was initially shared, it sent invitation emails to the group members. How do I manage invitations when I add someone to the group? It doesn't appear to do it automatically.

Managing Security Group for Shared Calendar access

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.

Microsoft Office

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.